IMO...on paper, the hp is meaningless, because there's always the ZL1 with more at 580...the hp junkies will gravitate towards that car.

The Z/28, on the other hand...isn't meant for high volume sales, and chances are only those who really understand it's purpose and value will buy it. These people care about lateral G's...brake equipment, and lap times...they know horsepower is just a part of the overall formula.

Chances are...imho...the addition of the CAI, and 3" exhaust all the way back will result in a 510-520 hp car...I think. But No. 3 could be completely right in saying it might not be recertified...

They can advertise whatever HP number they want, they just won't say it's SAE certified

GM's policy is to use SAE certified numbers only. So they can't advertise more than it makes. But it would be ok if it really made more. Refer to the 3.6L history. They used the certified CTS number until they re certified.

I'm not 100% on how the test works, but as I understand it you have a window (no more than a couple percent) that you can pick your advertised power from. I imagine that the LS7 was rated as conservatively as possible with the SAE test procedure, since I'm pretty sure it was the first engine that was certified with that procedure. If all that is true (which it might not be), they would have enough leeway to rate it at 515 or so without having to actually recertify it. I don't know if SAE allows such a thing to happen, but it is a potential loophole they could exploit.

__________________

Note, if I've gotten any facts wrong in the above, just ignore any points I made with them
__________________
Originally Posted by FbodFather

My sister's dentist's brother's cousin's housekeeper's dog-breeder's nephew sells coffee filters to the company that provides coffee to General Motors......